Trimmer for sewing-machines.



PATENTED DEC. 27, 1904.

S. H. WHEELER. TRIMMER FOR SEWING MACHINES.

APPLIGATION FILED FEB. 19 1903. I

a SHEETS-SHEET 1.

//v VENTOFI WITNESSES.-

ATTORNEY PATENTED DEC. 27, 1904.

S. H. WHEELER.

TRIMMER FOR SEWING MACHINES.

APPLICATION FILED PEB.19. 1903.

3 SHEETS-SHEET 2.

W/ TNE SSE 8 V M-i=5 A TTOHNEY A ,PATENTED DEC. 27, 1904;

V WHEELER.

TRIMMER FOR SEWING MACHINES.

APPLICATION FILED FEB. I9} 1903 3 SHEETS-SHEET 3.

WITNESSES:

Ciow-- I INVENTOR A TTOHNEY ivmvasse.

UNITED 1 STATES Patented December .127. 1904.

PATENT OFFICE.

SAMUEL H. WHEELER, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO WHEELER &WILSON MANUFACTURING COMPANY, OF BRIDGE- PORT, CONNECTICUT, ACORPORATION OF CONNECTICUT.

TRIMMER FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 778,389, dated December27, 1904.

Application filed February 19, 1903. Serial No. 144,078.

To all whom it may concern:

Be it known that I, SAMUEL H. WHEELER, a

citizen of theUnited States, residing at Bridgeport, in the, county ofFairfield and State of Connecticut, have invented a certain new anduseful Improvement in Trimmers for Sewing Machines, of which thefollowing is a full, clear, and exact description.

This invention relates to that class of sewing-machine trimmers by whichthe surplus material extending beyond the seam is removed simultaneouslywith the sewing opera tion; and one object of the invention is topositively control the movements of the trimmer or cutter blade so as tocooperate with the feed movements of the material, and thereby effectthe trimming while the needle is in the material and while the materialis firmly held between the throatplate and clothpresser.

In the present invention the stationary or ledger plate is adjustablysecured to the throatplate, while the actuated or trimmer blade isadjustably or otherwise rigidly secured to the feed-dog-carrying bar ormade integral with said bar and in such relation to the cloth-feed ingmechanism as to effect the trimming whilethe feed-dog is on its downwardreturn movement or atsuch time as the feed-dog is out of engagement withthe material.

As one illustration of the invention it is herein shown in connectionwith the wellknown Wheeler & Wilson sewingmachine commercially known asStyle 61; but only enough of the sewing-machine is shown to cover anoperative combination.

In the accompanying drawings, illustrating the invention, in the severalfigures of which like parts are similarly designated, Figure 1 is aperspective view showing the scroll-guard, trimmer blade, throat plate,cloth presser, and cloth-plate, together with a binding attachment,illustrating the application of my invention as used in connection witha binder for the production of an ornamental edge. Fig. 2 is averticalsection, on a larger scale, taken in the plane of line A B, Fig. 1. Fig.3 is a front end elevation, partly in section, of a Wheeler & Wilsonsewing-machine, substantially such as described in Patent No. 718,988,dated January 27, 1903. Fig. A is atop plan view of the throat-plate andadjacent parts, including the feed-dog and adj ustably-securedstationary or ledger plate. Fig. 5 is an end elevation, partly insection, of the sewing-machine frame, feed-dog-carrying, bar and itsoperating parts, together with the clothpresser and a modified formoftrimmer-blade located close to the needle-hole, as when used to trim 'anordinary seam. Fig. 6 is a perspective view of the throat plate,clothpresser, trimmer-blade, and stationary or ledger plate illustratedin Fig. 5, with the needleand a portion ofgthe needle-carrying bar. Fig.7 is a perspective view of the trimmer-blade of Fig. 5.

Fig. 8 is a perspective view of the stationary or ledger plate.

Fig. 9 is a perspective view of a modified form of trimmer-blade.

The needle-actuating shaft 1 is journaled within theusual arm 2 in anysuitable manner and is connected with the lower or hookdriver shaft 3 byan endless belt 41., adapted to engage a suitable pulley 5 on theneedleactuating shaft 1 and a like pulley (not shown) of one-half itsdiameter on the lower shaft.

6 is an eccentric fast on the upper shaft 1, and 7 is an eccentricstrap-rod, the upper end of which embraces the eccentric 6, while thelower end is pivotally connected, by means of a lever 8, to a feedrock-shaft (not shown) mounted at its opposite ends on pivot-pins 9,

one only of which is shown, (see Figs. 3 and 5,) beneath themachine-frame 10. The for Ward end of the rock-shaft is provided with anarm 11, said arm engaging in any suitable way the slotted portion 12 ofthe feed-dogcarrying bar 13, said eccentric G and connections causingthe usual rise and fall of the feed-dog 14.

15 is an eccentric strap-rod, the upper end of which embraces anadjustable eccentric 16. while the lower end is pivotally connected, bymeans of a lever 17 to a feed rock-shaft 18, mounted at its oppositeends on pivot-pins 19, one only of which is shown, (see Figs. 2,

3, and 5,) beneath the machine-frame. The 36, threaded into the bar 13,thus permitting 6 forward end of the rock-shaft 18 is provided the blade28 to be adjusted vertically, the with arms 20, which through thepivotal conscrews 36 acting as well to secure the blade nection 21transmit forward and return movein its adjusted position.

5 ments to the feed-dog-earrying bar 13, the Fig.9illustrates a modifiedconstruction for construction and operation of these parts beeffectingthe adjustments of the trimmer-blzule 7 ing substantially as in thepatent above re- 28. To the fecd-dog-carrying bar is secured ferred toand as herein illustrated and deby a screw 37 a bracket 38, having aslot 39, scribed, or any approved construction may be permitting thebracket to be adjusted verti- IO used wherein the movements of thefeed-dogcally and secured in the required position, and

carrying bar are positively controlled. mounted upon the bracket 38 by ascrew is 7 5 The needle 22 and the needle-carrier 23 and atrinnner-blade 4C1, having a slot 42, thus peractuating mechanism may beof any approved mitting the blade 41 to be moved laterally andconstruction. secured in such position as the nature of the I 5 Thethroat-plate 24 has a suitable screw 25 production may require.

extending up through a slot 26, (see Fig. 2,) To increase the eiiiciencyof the trimmer and said screw serves to engage and secure when appliedto the trimming of heavily-sized adjustably in place a ledger-plate 27,which materials, there is provided a scroll-guard 4:3, coacts with atrimmer-blade 28, adjustably secured to the cloth-plate M by a suitable20 secured to the feed-dog-carrying bar 13. screw 45, which guard actsto lead the sur- Referring to Figs. 1, 3, 5, and 6, the clothplusmaterial back or away from the trimmer- 5 presser 29 is constructed witha presser-foot blade and needle, substantially as illustrated 30extended sufficiently to firmly hold the in Fig. 1. material upon theledger-plate 27 during the 46 illustrates a binder attachment of well- 5time the trimmer-blade 28 is actuated to sever known construction, whichor any substitute the material, thus firmly gripping the matethereformay be used in connection with the 9 rial opposite the cutting edge ofthe trimmerpresent invention in certain kinds of work. blade during itscutting movement. Figs. 5, 6, and 7 illustrate a trimmer-blade From theforegoing it will be understood 47, having its cutting edge -18 carriedback 3 that the eccentric 6 transmits, through the nearer to the needle,as when used for trimconneetions 7, 8, and 11, the rising and fallingming an ordinary seam, differing in this re- 95 movements of thefeed-dog-carrying bar 13 spect and also in form from the trimmerand thatthe adjustable eccentric 16 transmits, blade 28. through the connections15, 17, and 18, the -19 represents pivot-pin-adjusting screws.

forward and return movements of the feedis the screw for securing thethroat-plate.

dog-carrying bar and that the movements of The various forms ortrimmeror cutter blade I the trimmer-blade 28 are primarily controlledherein shown and described are characterixwl by the movements of theeccentrics 6 and 16, in having a cutting member rising above and therebyeffecting the trimming of the mateoverhanging the machine-frame orthroat- A 4 rial by the return drop movement of the feedplate in theline of feed of the work and havdog-carrying bar and while the materialis ing a cutting edge on its under side which in- 5 held between thestationary or ledger plate clines upwardly relatively to theledger-plate, 27 and cloth-presser foot 30 and at such time so that thecut is efleeted ugon the downstroke as the needle is in the material andthe feedand when the feed is disengaged from the 45 dog 14 is out ofengagement with the matework.

rial, as is shown by the position of the respec- From the foregoing itwill be seen that the 1 10 I tive parts 13, 14, and 22, thetrimmer-blade. trimmer-blade is actuated to sever the mateand thepresser-foot, as illustrated in Figs. 3 rial while the feed-dog is outof contact with and 5, which show these parts in the position thematerial, and thus the operations of lirst 5 which they occupy just asthe trimmer-blade feeding and then trimming alternate, and

completes its downward movement to effect hence is avoided the doublelabor of feeding 5 the severing of the material. and trimming at thesame time, as has been In Fig. 2isillustrateda preferred construetheusual mode of operation in connection tion for effecting lateral andvertical adjustwith trimmer constructions wherein the acments of thetrimmer-blade 28. The lateral tuation of the trimmer-blade is indirectlyconadjustmentis effected byawedge-shaped block trolled by the movementsof the feed-dog or 120 31, located between the feed-dog-earrying bar itscarrying-bar. 13 and the trimmer-blade 28, the lower end of Thetrimmer-blademight bean integral part said block being provided withaslot 32,which of or be attached to the feed-dog without deis acted uponby a screw 33 to move the block parting from the spirit of theinvention.

in opposite directions. To effect the vertical hat I claim is 5adjustment of the blade 28, the shank or up- 1. In a sewing-machine, afeed mechanism right portion 34 of the blade 28 is provided including afeed-dog-carrying bar, means to with a slot 35, through which pass thescrews move it positively up and down, and separate means to move itpositively back and forth, combined with a stationary ledger-plate, anda trimmer-blade having an overhanging cutting member rising above theledger-plate in the line of feed and provided on its under side with acutting edge inclined upwardly from the ledger-plate, said trimmer-bladerigidly mounted upon the said bar and partaking of its movements andserving to cut upon the return drop of the said bar and while thefeeld-dog is out of engagement with the materla 2. In a sewing-machine,a presser. a feed mechanism including a feed-dog-carrying bar, means tomove said bar positively up and down and separate means to move itpositively back and forth, combined with a throatplate, a ledger-platestationarily secured to said throat-plate, and a trimmer-blade having acuttingmember rising above and overhanging. the throat-plate alongsidethe ledger-plate and provided on its underside with an upwardly-inclinedcutting edge in the line of feed, said trimmer blade rigidly mountedupon the feed-dog-carrying bar and movable by it upon its return drop toeffect the trimming of the material being sewed while the material isfirmly held between the throatplate and presser and the feed-dog is outof engagement with the material.

- 3. In a sewing-machine, afeed mechanism comprising eccentrics, afeed-dog and a feeddog-carrying bar, and connections, includingeccentric-straps, between said eccentrics and feed-dog-carrying' bar forgiving movements to said feed-dog, in combination with a ledgerplate anda trimmer-blade, the latter carried rigidly by said feed-dog-carryingbar, and

provided with an overhanging cutting member rising above theledger-plate and having an upwardly-inclined cutting edge in the line offeed which cooperates with said ledgerplate to sever the material as thefeed-dog is making its return movement preparatory to the feeding of thematerial.

4. In a sewing-machine, a feed mechanism comprising a presser, afeed-dog and a feeddog-carrying bar, eccentrics for positivelycontrolling the movements of said feed-dog, and a throat plate, incombination with a ledger-plate and a trimmer-blade, the latter carriedrigidly by said feed-dog-carrying bar and provided with a cutting memberrising above and overhanging the throat-plate in the line of feed andhaving an upwardly-in clined cutting edge on its under side cooperatingwith said ledger-plate to sever the material as the feed-dog is makingits return movement preparatory to the feeding of the material and Whilethe material is firmly held by the presser on the throat-plate.

5. In a sewing-machine, a feed mechanism comprising eccentrics, afeed-dog and a feeddog-carrying bar, and connections, includingeccentric-straps, between said eccentrics and the feeddog-carrying barfor giving movement to said feed-dog, in combination with anadjustably-secured ledger-plate and a trimmer-blade, the latteradjustable upon and rigidly carried by said feed-dog-carrying bar andhaving an overhanging cutting member rising above the ledger-plate andprovided on its under side with a cutting edge inclined upwardly fromthe ledger-plate and cooperating with said ledger-plate for severing thematerial while the needle is in the material and the feed-dog is making.its return movemelnt preparatory to the feeding of the mater1a v Intestimony whereof I have hereunto set my hand this 17th day of February,A. D. 1903.

SAMUEL H. WHEELER. Witnesses:

F. W. OSTROM, C. N. WOR'IHEN.

